Abstract: Obesity is one of today’s controversial public health problems. While obesity increases the risk of morbidity due to diseases such as diabetes and hypertension, a high Body Mass Index (BMI) is protective against bone loss. On the other hand, calcium individually is an important mineral that makes the bone structure firm. This cross-sectional study was conducted to assess the association between BMI and dietary calcium intake with Bone Mineral Density (BMD) among 299 postmenopausal women aged 50-65 years old. This study obtained information on demographic factors, energy and nutrient intake using pre-tested interviewer administrative questionnaire. Respondents were measured for weight, height and bone mineral density. Participants were categorized based on BM into normal (N), overweight (Ow) and obese (Ob). ANOVA and multiple logistic regression models were created to examine the associations between dependent and independent variables. The relationship between variables was tested with pearson’s correlation test. Of postmenopausal women, 26.6% were in N group and 73.4% were in Ow/Ob groups. Of the respondents, 67.2% had normal BMD and 32.8% had osteopenia/osteoporosis. Calcium intake higher than Dietary Reference Intakes (DRI) was a significant protective factor against osteopenia/osteoporosis (spine, 95% CI: 0.003-0.198) (femoral neck, 95% CI: 0.011- 0.289). There was no significant BMD difference between three BMI groups (p>0.05) and the relationship between calcium intake and BMI (normal, overweight and obese) was not statistically significant (p>0.05). It was concluded that in postmenopausal women, lower calcium dietary intake increases osteoporosis. Moreover, in the cases of adequate calcium intake, higher BMI may not affect BMD.